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Add 'notail' marker for call instructions.

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This marker prevents optimization passes from adding 'tail' or
'musttail' markers to a call. Is is used to prevent tail call
optimization from being performed on the call.

rdar://problem/22667622

Differential Revision: http://reviews.llvm.org/D12923


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252368 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2015-11-06 23:55:38 +00:00
parent 6bd362c2d9
commit c35973bfb0
11 changed files with 56 additions and 6 deletions
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3
lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -2131,7 +2131,8 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
Vals.push_back(VE.getAttributeID(CI.getAttributes()));
Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()) |
unsigned(CI.isMustTailCall()) << 14 | 1 << 15);
unsigned(CI.isMustTailCall()) << 14 | 1 << 15 |
unsigned(CI.isNoTailCall()) << 16);
Vals.push_back(VE.getTypeID(FTy));
PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee